衝撃波管による燃料噴霧の着火現象の研究

概要

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A shock tube technique was developed to observe the ignition process of sprays free from aerodynamic phenomena, such as atomization and mixing. In this technique, a premixed spray column, falling freely from an ultrasonic atomizer directed downwards, was ignited by a reflected shock. The ignition processes observed by this technique seem to be different in essence from those observed by the usual injection technique, in which fuel is injected into a hot atmoshere. The probability of normal ignition occurring reduces rapidly as the temperature is lowered below 1060 K for cetane and a pressure of 0.85 MPa. The luminosity of the flame varies widely up and down, and the period of appearance of a luminous flame observable by high-speed photography is only a part of the ignition process. The dependences of the ignition delay on the temperature and pressure also differ substantially from those obtained by the injection technique.
社団法人日本機械学会の論文
1986-04-25